It also has recorded its fastest average ambulance response time for life-threatening medical emergencies. It’s exactly 61/2 minutes — a second faster than in 2011.

Bloomberg called it “a historic year for public safety.”

“The FDNY has consistently improved fire safety over the past decade and has continued to drive response times to historic lows,” he said. “These achievements and the efforts by our firefighters, EMT’s and paramedics to save lives – while putting theirs on the line – is the reason fewer New Yorkers died as a result of fire in 2012 than ever before.”

In 79 percent of 2012’s fatal fires, officials said there was no working smoke detector present.